Its body is flattened, narrow at the front and usually wider and rounded at the rear. It feeds on algae on rocks and can be abundant on rocky shores.
The side flaps join except for a small gap along the rear midline. Low bumps cover the back, which can be mottled green, brown or pink.
It feeds on patches of algae on rocks. It can be abundant in rocky intertidal areas and moves with a leech-like motion.
An extinction-risk assessment has not been added yet.